Guys- I’m looking to mod my kids PW80 for overall performance on the bottom end specifically. I’ve dropped to a 13 tooth count front sprocket and am entertaining bumping up count on rear. What’s the maximum tooth count you can run on the rear end of PW80? Also, if you have link to or part number for the optimum sprocket it’d be appreciated. If you have suggestions for mods I’ll hear all of them. I don’t look to spend too much modifying this thing cause we all know I’ll only get so much out of it. LMK and TIA!